The Research Unit of a company planned to conduct a customer

The Research Unit of a company planned to conduct a customer satisfaction survey. In the working committee meeting, chairman turned to the consultant that the company hired to conduct the study and said: “The most important question is that how large should the sample size so that the sample is representative.” A few possible answers had gone through the mind of the consultant and they are given below. Identify which of them are correct.

i) As long as the sample size is around 70% of the population size, then the sample is representative.

ii) If the proportions of some demographic attributes of the sample are quite similar to that of the population, then the sample is representative.

a)Only statement (i) is correct.

b)Only statement (ii) is correct.

c)Both statements (i) and (ii) are correct.

d)Both statements (i) and (ii) are incorrect.

Solution

c)Both statements (i) and (ii) are correct.